220020869 has 4 divisors (see below), whose sum is σ = 220287744. Its totient is φ = 219753996.

The previous prime is 220020863. The next prime is 220020877. The reversal of 220020869 is 968020022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220020869 - 2¹² = 220016773 is a prime.

It is a super-2 number, since 2×220020869² = 96818365591030322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132197 + ... + 133850.

It is an arithmetic number, because the mean of its divisors is an integer number (55071936).

Almost surely, 2^220020869 is an apocalyptic number.

It is an amenable number.

220020869 is a deficient number, since it is larger than the sum of its proper divisors (266875).

220020869 is an equidigital number, since it uses as much as digits as its factorization.

220020869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266874.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 220020869 is about 14833.1004513554. The cubic root of 220020869 is about 603.7001612889.

The spelling of 220020869 in words is "two hundred twenty million, twenty thousand, eight hundred sixty-nine".